Sun block formulation

ABSTRACT

Described herein is a natural, mineral sunscreen that combines natural oxides with high linoleic acid natural oils. The result is a safe, natural formula for the whole family which is naturally tinted and made from natural ingredients. The composition has an SPF rating of 50+ and provides broad spectrum UVA and UVB protection. The composition contains powerful anti-oxidants, no artificial fragrance(s), is hypoallergenic and is safe for sensitive skin.

PRIOR APPLICATION INFORMATION

The instant application is a 371 of PCT Application CA2017/050679, filedJun. 15, 2017 which claims the benefit of US Provisional PatentApplication, filed Jun. 8, 2016, under Ser. No. 62/347,338, entitled“Sun Block Formulation”, the contents of which are incorporated hereinby reference.

BACKGROUND OF THE INVENTION

Sunscreens and sunblocks are products that help prevent ultraviolet (UV)radiation from the sun from reaching and damaging the skin.

Ultraviolet A (UVA) refers to the longer wave UV rays that cause lastingskin damage, skin aging and can promote the development of skin cancer.Ultraviolet B (UVB) refers to the shorter wave UV rays that causesunburns, skin damage and can promote the development of skin cancer.

Broad-spectrum products provide protection against both UVA and UVBrays.

Sun Protection Factor or SPF is a measure of a sunscreen's or sunblock'sability to prevent UVB from damaging the skin. For example, if it takesapproximately 20 minutes for a person's skin to start to visibly burn,using a product with an SPF of 15 will provide 20 minutes(unprotected)×15 SPF, or 300 minutes (5 hours) of protection.

However, many sunscreens that offer broad UV protection and high SPF areeither unstable or lack a suitable or desirable cosmetic finish. Forexample, the sunscreen can dry the skin, can feel heavy on the skin orleave a residue behind or may include compounds to which the user's skinreacts adversely, leading to irritation, rashes and/or other skinailments.

Specifically, many chemical sunscreens contain one or more potentiallyharmful chemical actives.

For example, oxybenzone is known to penetrate the skin and can act likeestrogen in the body. Oxybenzone can also trigger allergic skinreactions.

Homosalate is a weak hormone disrupter which can be broken down byexposure to sunlight into potentially harmful by-products.

Octinoxate has been shown to have hormone-mimicking effects onlaboratory animals.

Retinyl palmitate has been shown to speed the development of skin tumorsand lesions on sun-exposed skin.

As will be apparent to one of skill in the art, a sunscreen which lacksa desirable “skin feel” may not be applied frequently enough and/or to asufficient degree for proper protection to be attained. Furthermore,sunscreens that focus on skin feel may lack sufficient UV protection

An all-natural ingredient product which provides excellent sunblockingactivity and also promotes and supports skin health is needed.

SUMMARY OF THE INVENTION

According to a first aspect of the invention, there is provided a sunblock formulation comprises the following formula:

-   -   20-80% (w/w) high linoleic acid natural oils;    -   5-25% (w/w) zinc oxide, titanium dioxide or mixture thereof;    -   0.5-15.0% (w/w) Candelilla wax; Carnauba wax; Sunflower seed        wax; Beeswax; polyglyceryl-3 beeswax; carnauba wax, chuan wax,        microcrystalline wax; glyceryl behenate; glyceryl        behenate/eicosadioate or a mixture thereof; and    -   0.5-15.0% (w/w) rice bran wax, carnauba wax, chuan wax or a        mixture thereof.

The high linoleic acid natural oil may be a natural oil that has alinoleic content of approximately 60% or greater, for example, saffloweroil, grape seed oil, poppyseed oil, sunflower oil, hemp oil or corn oil.

In some embodiments, the formula comprises:

-   -   20-80% (w/w) safflower oil, grape seed oil, poppyseed oil,        sunflower oil, hemp oil, corn oil or a mixture thereof;    -   5-25% (w/w) zinc oxide, titanium dioxide or mixture thereof;    -   0.5-15.0% (w/w) Candelilla wax; Carnauba wax; Sunflower seed        wax; Beeswax; polyglyceryl-3 beeswax; carnauba wax, chuan wax,        microcrystalline wax; glyceryl behenate; glyceryl        behenate/eicosadioate or a mixture thereof; and    -   0.5-15.0% (w/w) rice bran wax.

In other embodiments, the formula comprises:

-   -   20-80% (w/w) safflower oil, grape seed oil, poppyseed oil,        sunflower oil, or a mixture thereof    -   5-25% (w/w) zinc oxide, titanium dioxide or mixture thereof;    -   0.5-15.0% (w/w) Candelilla wax; Carnauba wax; Sunflower seed        wax; Beeswax; polyglyceryl-3 beeswax; carnauba wax, chuan wax,        microcrystalline wax; glyceryl behenate; glyceryl        behenate/eicosadioate or a mixture thereof; and    -   0.5-15.0% (w/w) rice bran wax.

In yet other embodiments, the formula comprises

10-40% (w/w) Grape seed Oil; 10-40% (w/w) Safflower Oil; 10-25% (w/w)Zinc Oxide, titanium dioxide or a mixture thereof; 2-40% (w/w)Emulsifier; 1-15% (w/w) Candelilla wax; 1-15% (w/w) Rice Bran wax;0.2-0.4% (w/w) anti-oxidant source; 0.05-0.2% (w/w) coloring agent;0.05-0.2% (w/w) insect repelling agent; 0.04-0.1% (w/w) antisepticagent;

In a preferred embodiment, the formula consists of:

34.9% (w/w) Grape seed Oil; 32.105% (w/w) Safflower Oil; 24.5% (w/w)Zinc Oxide; 4% (w/w) Beeswax; 2% (w/w) Candelilla wax; 2% (w/w) RiceBran wax; 0.2% (w/w) Green Tea Powder; 0.1% (w/w) Red2 Pigment; 0.15%(w/w) Lavender Extract Oil; 0.045% (w/w) Rosemary Extract Oil.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

Unless defined otherwise, all technical and scientific terms used hereinhave the same meaning as commonly understood by one of ordinary skill inthe art to which the invention belongs. Although any methods andmaterials similar or equivalent to those described herein can be used inthe practice or testing of the present invention, the preferred methodsand materials are now described. All publications mentioned hereunderare incorporated herein by reference.

Described herein is a sun block formulation or composition comprisingall natural ingredients. As discussed herein, the formulation is a broadspectrum product and provides an SPF of 50+.

In many embodiments, the composition has no perfumes and ishypoallergenic. The composition is safe for application tosensitive.skin.

As will be apparent to one of skill in the art, “sensitive skin” refersto skin that easily or frequently breaks out in rashes and/or getsblotchy or itchy or experiences a stinging sensation in response tocertain stimuli, such as, for example, application of certain productsto the skin. It is important to note however that even people who do notconsider themselves to have sensitive skin can react adversely to theapplication of certain chemicals and/or compounds.

As discussed herein, the composition includes natural sources oflinoleic acid and anti-oxidants. Linoleic acid is involved in thesynthesis of tissue lipids and provides healing support and moisturizingto skin. Essential fatty acids such as linoleic acid are also believedto facilitate the penetration of anti-oxidants, which have been shown invitro to inhibit formation of free radicals which are associated withskin damage in vivo.

In an embodiment of the invention, the sun block formulation comprisesthe following formula:

-   -   20-80% (w/w) high linoleic acid natural oils;    -   5-25% (w/w) zinc oxide, titanium dioxide or mixture thereof;    -   0.5-15.0% (w/w) Candelilla wax; Carnauba wax; Sunflower seed        wax; Beeswax; polyglyceryl-3 beeswax; carnauba wax, chuan wax,        microcrystalline wax; glyceryl behenate; glyceryl        behenate/eicosadioate or a mixture thereof; and    -   0.5-15.0% (w/w) rice bran wax, carnauba wax, chuan wax or a        mixture thereof.

In all formulae recited herein, the percentages are expressed on aweight/weight basis.

In some embodiments, the sunscreen formulation comprises:

-   -   20-80% (w/w) high linoleic acid natural oils;    -   5-25% (w/w) zinc oxide, titanium dioxide or mixture thereof;    -   0.5-15.0% (w/w) Candelilla wax; Carnauba wax; Sunflower seed        wax; Beeswax; polyglyceryl-3 beeswax; carnauba wax; chuan wax;        microcrystalline wax; glyceryl behenate; glyceryl        behenate/eicosadioate or a mixture thereof; and    -   0.5-15.0% (w/w) rice bran wax, carnauba wax, chuan wax or        mixture thereof, with the proviso that no water is added to the        formulation.

As used herein, “high linoleic acid natural oil” refers to a natural oilthat has a linoleic content of approximately 60% or greater. Forexample, such oils include but are by no means limited to safflower oil,grape seed oil, poppyseed oil, sunflower oil, hemp oil and corn oil.

According to another aspect of the invention, there is provided asunscreen formulation comprising:

-   -   20-80% (w/w) safflower oil, grape seed oil, poppyseed oil,        sunflower oil, hemp oil, corn oil or a mixture thereof;    -   5-25% (w/w) zinc oxide, titanium dioxide or mixture thereof;    -   0.5-15.0% (w/w) Candelilla wax; Carnauba wax; Sunflower seed        wax; Beeswax; polyglyceryl-3 beeswax; carnauba wax; chuan wax;        microcrystalline wax; glyceryl behenate; glyceryl        behenate/eicosadioate; or a mixture thereof; and    -   0.5-15.0% (w/w) rice bran wax.

In some embodiments, the sunscreen formulation comprises:

-   -   20-80% (w/w) safflower oil, grape seed oil, poppyseed oil,        sunflower oil, hemp oil, corn oil or a mixture thereof    -   5-25% (w/w) zinc oxide, titanium dioxide or mixture thereof;    -   0.5-15.0% (w/w) Candelilla wax; Carnauba wax; Sunflower seed        wax; Beeswax; polyglyceryl-3 beeswax; carnauba wax; chuan wax;        microcrystalline wax; glyceryl behenate; glyceryl        behenate/eicosadioate or a mixture thereof; and    -   0.5-15.0% (w/w) rice bran wax, with the proviso that no water is        added to the formulation.

According to another aspect of the invention, there is provided asunscreen formulation comprising:

-   -   20-80% (w/w) safflower oil, grape seed oil, poppyseed oil,        sunflower oil, or a mixture thereof;    -   5-25% (w/w) zinc oxide, titanium dioxide or mixture thereof;    -   0.5-15.0% (w/w) Candelilla wax; Carnauba wax; Sunflower seed        wax; Beeswax; polyglyceryl-3 beeswax; carnauba wax; chuan wax;        microcrystalline wax; glyceryl behenate; glyceryl        behenate/eicosadioate or a mixture thereof; and    -   0.5-15.0% (w/w) rice bran wax.

In some embodiments, the sunscreen formulation comprises:

-   -   20-80% (w/w) safflower oil, grape seed oil, poppyseed oil,        sunflower oil, or a mixture thereof    -   5-25% (w/w) zinc oxide, titanium dioxide or mixture thereof;    -   0.5-15.0% (w/w) Candelilla wax; Carnauba wax; Sunflower seed        wax; Beeswax; polyglyceryl-3 beeswax; carnauba wax; chuan wax;        microcrystalline wax; glyceryl behenate; glyceryl        behenate/eicosadioate or a mixture thereof; and    -   0.5-15.0% (w/w) rice bran wax, with the proviso that no water is        added to the formulation.

According to another aspect of the invention, there is provided asunscreen formulation comprising:

-   -   20-80% (w/w) safflower oil, grape seed oil, poppyseed oil,        sunflower oil, or a mixture thereof;    -   5-25% (w/w) zinc oxide, titanium dioxide or mixture thereof;    -   0.5-15.0% (w/w) Candelilla wax; Carnauba wax; Sunflower seed        wax; Beeswax; polyglyceryl-3 beeswax; carnauba wax; chuan wax;        microcrystalline wax; glyceryl behenate; glyceryl        behenate/eicosadioate or a mixture thereof; and    -   0.5-4.0% (w/w) rice bran wax.

In some embodiments, the sunscreen formulation comprises:

-   -   20-80% (w/w) safflower oil, grape seed oil, poppyseed oil,        sunflower oil, or a mixture thereof    -   5-25% (w/w) zinc oxide, titanium dioxide or mixture thereof;    -   0.5-15.0% (w/w) Candelilla wax; Carnauba wax; Sunflower seed        wax; Beeswax; polyglyceryl-3 beeswax; carnauba wax; chuan wax;        microcrystalline wax; glyceryl behenate; glyceryl        behenate/eicosadioate or a mixture thereof; and    -   0.5-4.0% (w/w) rice bran wax, with the proviso that no water is        added to the formulation.

As will be known to those of skill in the art, zinc oxide istraditionally considered difficult to work with, as prior art productscontaining zinc oxide typically clump and are hard to spread.Furthermore, many prior art natural/physical sunscreen products have thelimitation that the ingredients separate which makes themunusable/unsaleable after a short period of time. Thus, the product'soverall effectiveness will be lower due to difficulties in applicationas a result of either clumping or separation.

In contrast, the inventor has developed a product in which the rice branwax maintains the stability and integrity of the product and hasdeveloped a manufacturing process with an optimized “tubing” oraliquoting temperature which results in a product that spreads easilywhen distributed from the tube. As such, the inventor has discoveredthat the surprising combination of rice bran wax and a “tubing”temperature between 28-33C produces a final product that has long-termstability and excellent properties during application, therebyovercoming the limitations of many prior art natural products.

In some embodiments, the sun block composition or formulation mayfurther include a coloring agent. As will be appreciated by one of skillin the art, the addition of a coloring agent reduces the risk that thecomposition will not be applied to certain regions of exposed skin asthe user can clearly identify to which regions the formulation has beenapplied.

In some embodiments, the sun block composition further includes anemulsifier, preferably a natural emulsifier. In some embodiments, theemulsifier is beeswax.

Grape seed oil is an antioxidant-rich oil cold-pressed from grape seeds,sometimes referred to as “the perfect oil for the babies' skin”. It is afavored oil for massage blends because of its light texture, and lack ofcolour and odour. It is one of the highest sources of polyunsaturatedfatty acids.

Safflower oil has the highest linoleic acid content of all vegetableoils. Safflower oil has superior skin compatibility.

Extracted from the oil of safflower seeds, the oil is a potent hydratorand ideal for dry, sensitive complexions Safflower oil containslubricant properties that prompt the skin to retain water and moisture.Safflower oil prevents dryness and roughness of the skin and is oftenused in products for the treatment of skin conditions such as eczema,psoriasis and acne. Its hydrating properties lend skin a healthy glow,promote elasticity, reduce the appearance of wrinkles and has occlusiveproperties.

Occurring in nature as zincite, zinc oxide is a water-insolublesubstance that makes an excellent sunblock, protecting skin from UVA andUVB rays. It is a naturally occurring mineral that deflects the sun'sburning rays off the skin, offering significant protection from damagingUVA/UVB rays.

Candelilla wax is extracted from Euphorbia cerifera, a shrub native toMexico and is an effective emollient with extraordinary protectingproperties. Candelilla Wax has a moderate melting range, good gloss,durable film and a low coefficient of contraction. Properties such aschemical stability, water repellency, and high melting point makeCandelilla useful in liquid, paste and waterproofing compounds.

It is also used as a thickening agent, an emollient and a film formingagent enabling water-repellence. The film forming properties ofCandellia wax offer the possibility to use it as a fixative for UVfilters in products. For this invention, Candellia wax was primarilychosen for the water repellence and UV filtering properties.

Rice bran wax is the vegetable wax extracted from the bran oil of rice.It is used as an emollient and thickener.

Specifically, Rice Bran Wax is obtained through the cold press de-waxingof rice oil which yields a yellow, hard natural wax with a high meltpoint.

Rice Bran Wax is a superior binder of oils and has been useful incombining with and stabilizing oils in both anhydrous and emulsionsystems. It is seen as particularly effective in reducing syneresis inoil-based systems.

Rice Bran Wax is compatible with most vegetable and mineral waxes, aswell as vegetable oils, mineral oils and petrolatums.

Previously, the inventor had used only Candelilla wax in the formulationand experimented with different formulae in the effort to find one thatwould not separate.

When sunscreen formulations separate what usually comes out first is thewater and oils (liquid portion of the formula) and followed behind willbe the waxes and mineral compositions, that is, the thicker ingredients.Depending on the formulation, separation can be seen in less than 3months post-packaging.

When the product separates the oils will become rancid and unsafe foruse. The liquid ingredients or oils will come to the top and separatefrom the thicker more stable ingredients. When the oils separate theywill become oxidized or effectively rancid. It leads to the formation offree radicals and advanced lipid oxidation end products (ALEs), whichare chemicals that are toxic and damaging to cells. Furthermore, thethicker ingredients may become discolored and difficult to dispense outof tube or apply to skin.

After much experimentation, the inventor found that prevention ofseparation was possible, but only after a high percentage of Candelillawax was used. Specifically, from 0.5% to 4.0% resulted in separation ofthe product. While separation stopped at 4.0%, this formulation was toothick and could not be squeezed through a tube. It was decided toinstead store the product in a jar; however, it was found that thisdeveloped a hard surface after repeated exposure to the air (opening thelid)

Surprisingly, the inventor found that when Rice Bran Wax was used incombination with the Candelilla wax, the formulation became stable.Specifically, the formulation did not separate and became easy tosqueeze out of a tube and easy to apply to skin.

Specifically, the formulation has a smooth creamy texture making it easyto squeeze from a tube and apply to the skin

While not wishing to be bound to a particular theory or hypothesis, itis believed that Candelilla wax is rich in nutrients and easily absorbedinto the skin, allowing it to act as a barrier and help prevent moistureloss. It also works to bind ingredients together, whilst creating aworkable texture. This means that it can be used to stiffen the textureof products without making them hard or it can be used as an emulsifierto prevent oil and water components from separating in products with acreamy consistency. Rice Bran Wax has similar properties to Carnauba waxand Chuan wax, but is a superior emulsifier of oils and acts as abinder. Rice Bran wax when combined with Candelilla wax helped form thestability and the creamy texture needed to be able to be squeezed out ofa tube and easily applied to the skin.

In a preferred embodiment, the sun block formulation comprises thefollowing formula:

10-40% (w/w) Grape seed Oil 10-40% (w/w) Safflower Oil 10-25% (w/w) ZincOxide, titanium dioxide or a mixture thereof 2-40% (w/w) Emulsifier1-15% (w/w) Candelilla wax 1-15% (w/w) Rice Bran wax 0.2-0.4% (w/w)anti-oxidant source 0.05-0.2% (w/w) coloring agent 0.05-0.2% (w/w)insect repelling agent 0.04-0.1% (w/w) antiseptic agent.

In a preferred embodiment, the sun block formulation comprises thefollowing formula:

10-40% (w/w) Grape seed Oil 10-40% (w/w) Safflower Oil 10-25% (w/w) ZincOxide, titanium dioxide or a mixture thereof 2-40% (w/w) Emulsifier 1-4%(w/w) Candelilla wax 1-4% (w/w) Rice Bran wax 0.2-0.4% (w/w)anti-oxidant source 0.05-0.2% (w/w) coloring agent 0.05-0.2% (w/w)insect repelling agent 0.04-0.1% (w/w) antiseptic agent

In some embodiments, the anti-oxidant source is green tea. Green tea isa powerful antioxidant, being 20 times stronger than vitamin E (alphatocopherol). Antioxidants such as green tea inhibit the formation ofcancer-causing free radicals and help prevent skin cell damage caused bysun exposure and pollution. An anti-inflammatory and anti-irritant,green tea is high in xanthines, and is very soothing and moisturizing toskin.

In some embodiments, the emulsifier is beeswax. Beeswax is a waxsecreted by honey bees. Beeswax is typically used as a natural thickenerand emulsifier. Beeswax also acts as a barrier agent that locks inskin's natural moisture.

In some embodiments, the insect repelling agent is selected fromCitronella oil, Clove oil, Lemongrass oil, Rosemary oil, Tea Tree oil,Eucalyptus oil, Cedar oil, Catnip oil, Mint oil, and lavender essentialoil. In some embodiments, the insect repelling oil is lavender essentialoil. Lavender essential oil is a potent repellant for many types of bugslike mosquitoes, midges, and moths and has anti-inflammatory qualitiesthat will reduce the irritation and the pain associated with bug bites.

In some embodiments, the antiseptic agent is selected from CinnamonEssential Oil, Geranium oil, Clove oil, and rosemary essential oil. In apreferred embodiment, the antiseptic agent is rosemary essential oil.Rosemary essential oil has antimicrobial and antiseptic qualities thatmake it beneficial for skin. Topical application of the essential oilhelps in toning the skin and removing dryness. It can also give the skina healthy, even glow.

In some embodiments, the coloring agent is Red2 pigment, which isHematite/iron oxide. This mineral is used as a coloring agent incosmetic products. Hematite varies in color from reddish-brown to black.(as an example, calamine lotion contains Zinc Oxide and a small amountof iron oxide to give a pink product)

In a preferred embodiment, the sun block formulation comprises thefollowing formula:

34.9% (w/w) Grape seed Oil 32.105% (w/w) Safflower Oil 24.5% (w/w) ZincOxide 4% (w/w) Beeswax 2% (w/w) Candelilla wax 2% (w/w) Rice Bran wax0.2% (w/w) Green Tea Powder 0.1% (w/w) Red2 Pigment 0.15% (w/w) LavenderExtract Oil 0.045% (w/w) Rosemary Extract Oil

For use, the high linoleic acid natural oils are mixed with the waxes.The mixture is then heated to a temperature suitable for melting of thewaxes, for example, 75° C. Once the waxes have melted the oxide sourceis then added while mixing until the oxide is completely dissolved inthe mixture. The coloring agent may then be added and the mixture ismixed until the pigment is approximately evenly distributed throughoutthe mixture. At this point, heating is discontinued and mixing continuesuntil the mixture reaches a temperature below 40° C. At that point, theessential oils, for example, Citronella oil, Clove oil, Lemongrass oil,Rosemary oil, Tea Tree oil, Eucalyptus oil, Cedar oil, Catnip oil, Mintoil, and/or lavender essential oil, as discussed above, are added.

In some embodiments, the mixture is distributed or aliquoted or “tubed”at a temperature of between 25 C-33 C, for example, 26 C-33 C, 27 C-33C, 28 C-33 C, 29 C-33 C, 30 C-33 C, 31 C-33 C, 32 C-33 C, 25 C-32 C, 26C-32 C, 27 C-32 C, 28 C-32 C, 29 C-32 C, 30 C-32 C, 31 C-32 C or about32 C.

Specifically, it has been found that surprisingly at room temperature,the product, that is, the final mixture, is extremely fluid.Consequently, the product easily pours out of the tube and feels wateryon the skin. Furthermore, when aliquoted at 34 C, the product clumps upinside the tube which makes it difficult for the product to bedistributed out of the tube. Furthermore, the product does not spreadnicely or smoothly on the skin. However, when the product is aliquotedat a temperature between 25-33 C, or between 28 C-33 C or between 30-33C or about 32 degrees, the texture of the product when distributed fromthe tube is smooth and of the desired texture. Furthermore, the productcan be squeezed easily out of the tube and spreads nicely on the skin.

The resulting product has a smooth creamy consistency, and is easilysqueezed out of a tube.

According to an aspect of the invention, there is provided a method ofpreparing a sun block product comprising:

-   -   mixing:        -   20-80% (w/w) high linoleic acid natural oils;        -   0.5-15.0% (w/w) Candelilla wax; Carnauba wax; Sunflower seed            wax; Beeswax; polyglyceryl-3 beeswax; carnauba wax; chuan            wax; microcrystalline wax; glyceryl behenate; glyceryl            behenate/eicosadioate or a mixture thereof; and        -   0.5-15.0% (w/w) rice bran wax, carnauba wax, chuan wax or            mixture thereof, thereby producing a mixture;    -   heating the mixture to about 75 C;    -   adding 5-25% (w/w) zinc oxide, titanium dioxide or mixture        thereof to the mixture; and    -   cooling the mixture.

In some embodiments, the mixture is cooled to a temperature between25-33 C, or between 28 C-33 C or between 30-33 C or about 32 degrees andaliquoted or distributed into tubes.

According to an aspect of the invention, there is provided a method ofpreparing a sun block product comprising:

-   -   mixing:        -   20-80% (w/w) safflower oil, grape seed oil, poppyseed oil,            sunflower oil, hemp oil, corn oil or a mixture thereof;        -   0.5-15.0% (w/w) Candelilla wax; Carnauba wax; Sunflower seed            wax; Beeswax; polyglyceryl-3 beeswax; carnauba wax; chuan            wax; microcrystalline wax; glyceryl behenate; glyceryl            behenate/eicosadioate or a mixture thereof; and        -   0.5-15.0% (w/w) rice bran wax, thereby producing a mixture;    -   heating the mixture to about 75 C;    -   adding 5-25% (w/w) zinc oxide, titanium dioxide or mixture        thereof to the mixture; and    -   cooling the mixture.

In some embodiments, the mixture is cooled to a temperature between25-33 C, or between 28 C-33 C or between 30-33 C or about 32 degrees andaliquoted or distributed into tubes.

According to an aspect of the invention, there is provided a method ofpreparing a sun block product comprising:

-   -   mixing:        -   20-80% (w/w) safflower oil, grape seed oil, poppyseed oil,            sunflower oil, or a mixture thereof;        -   0.5-15.0% (w/w) Candelilla wax; Carnauba wax; Sunflower seed            wax; Beeswax; polyglyceryl-3 beeswax; carnauba wax; chuan            wax; microcrystalline wax; glyceryl behenate; glyceryl            behenate/eicosadioate or a mixture thereof; and        -   0.5-15.0% (w/w) rice bran wax, thereby producing a mixture;    -   heating the mixture to about 75 C;    -   adding 5-25% (w/w) zinc oxide, titanium dioxide or mixture        thereof to the mixture; and    -   cooling the mixture.

In some embodiments, the mixture is cooled to a temperature between25-33 C, or between 28 C-33 C or between 30-33 C or about 32 degrees andaliquoted or distributed into tubes.

According to an aspect of the invention, there is provided a method ofpreparing a sun block product comprising:

-   -   mixing:        -   20-80% (w/w) safflower oil, grape seed oil, poppyseed oil,            sunflower oil, or a mixture thereof;        -   0.5-15.0% (w/w) Candelilla wax; Carnauba wax; Sunflower seed            wax; Beeswax; polyglyceryl-3 beeswax; carnauba wax; chuan            wax; microcrystalline wax; glyceryl behenate; glyceryl            behenate/eicosadioate or a mixture thereof; and        -   0.5-4.0% (w/w) rice bran wax;    -   heating the mixture to about 75 C;    -   adding 5-25% (w/w) zinc oxide, titanium dioxide or mixture        thereof to the mixture; and    -   cooling the mixture.

In some embodiments, the mixture is cooled to a temperature between25-33 C, or between 28 C-33 C or between 30-33 C or about 32 degrees andaliquoted or distributed into tubes.

In some embodiments, the mixture is cooled to a temperature of about 40C prior to aliquoting and essential oils are added to the mixture, asdiscussed above.

For use, apply approximately 1 oz of the composition liberally andevenly to exposed skin approximately 15 minutes before sun exposure;however, the product works immediately upon application. Reapply atleast every 2 hours. Reapply after 80 minutes of swimming or sweating.Reapply immediately after towel drying.

The resulting product is a natural, mineral sunscreen. The result is asafe, natural formula that offers superior sunburn protection for thewhole family which is naturally tinted and made from naturalingredients. The composition has an SPF rating of 50+ and provides broadspectrum UVA and UVB protection. The product is also very waterresistant even after 80 minutes. The composition contains powerfulanti-oxidants, no artificial fragrance(s), is hypoallergenic and is safefor sensitive skin.

A formulation comprising:

Grape seed Oil (w/w) 34.90% Safflower Oil (w/w) 34.90% Zinc Oxide (w/w)24.50% Beeswax (w/w)  4.90% Candellilla wax (w/w)  0.50% Green TeaPowder (w/w)  0.20% Red 2 Pigment (w/w)  0.10%

-   -   was tested to determine SPF and for broad spectrum UV        protection.

Specifically, the sun protection factor determination test was carriedout as defined by the FDA Sunscreen Final Rule: 21 CFR Parts 201 and 310[Docket No. FDA-1978-N-0018] using a Xenon arc solar simulator as the UVsource. This test was conducted prior to and immediately following an 80minute water immersion experiment which was carried out prior to andimmediately following an 80 minute water immersion experiment.

10 test subjects from 20-59 years were used in the test. One testsubject had Type I skin (always burns easily, never tans); 7 testsubjects had Type II skin (always burns easily; tans minimally); and 1test subject had Type III skin (burns moderately; tans gradually).

The results of the test showed that the formulation provided an SPF ofbetween 51.00 to 58.65 for all subjects, regardless of skin type.

The formulation was also subjected to a continuous emission spectrumfrom 290 to 400 nm with a limit of 1500 W/m² on total solar simulatorirradiance for all wavelengths between 250 and 1400 nm. The followingpercentages of erythema-effective radiation in each specified range ofwavelengths was obtained:

Wavelength Erythemal Range (nm) Contribution (%) <290 <0.1 290-3001.0-8.0 290-310 49.0-65.0 290-320 85.0-90.0 290-330 91.5-95.5 290-34094.0-97.0 290-400  99.9-100.0

The scope of the claims should not be limited by the preferredembodiments set forth in the examples but should be given the broadestinterpretation consistent with the description as a whole.

The invention claimed is:
 1. A method of preparing a sun block product comprising: mixing: 20-80% (w/w) safflower oil, grape seed oil, poppyseed oil, sunflower oil, or a mixture thereof; 0.5-15.0% (w/w) candelilla wax with optionally beeswax or polyglyceryl-3 beeswax; and 0.5-15.0% (w/w) rice bran wax to produce a mixture; heating the mixture to about 75° C.; adding 5-25% (w/w) zinc oxide, titanium dioxide or mixture thereof to the mixture; and cooling the mixture, wherein the mixture is cooled to a temperature between 25-33° C. prior to being aliquoted into tubes, wherein the obtained sun block product is stable without ingredients separation; and has a creamy structure which is soft to be squeezed out of the tubes, compared to a sun block product without the rice bran wax.
 2. The method according to claim 1 wherein the mixture is cooled to a temperature between 28 C-33° C. prior to being aliquoted into tubes.
 3. The method according to claim 2 wherein the mixture is cooled to a temperature between 30-32° C. prior to being aliquoted into tubes.
 4. The method according to claim 1 wherein the mixture is cooled to a temperature of about 32° C. prior to being aliquoted into tubes.
 5. The method according to claim 1 further comprising aliquoting the cooled mixture into tubes.
 6. The method according to claim 1 wherein the sun block product comprises: 0.5-4.0% rice bran wax.
 7. The method according to claim 1 wherein the sun block product comprises 10-40% grape seed oil; 10-40% safflower oil; 10-25% zinc oxide, titanium dioxide or a mixture thereof; 1-15% candelilla wax; and 1-15% rice bran wax, and further comprises 2-40% emulsifier; 0.2-0.4% anti-oxidant source; 0.05-0.2% coloring agent; 0.05-0.2% insect repelling agent; and 0.04-0.1% antiseptic agent.
 8. The method according to claim 1 wherein the sun block product comprises 10-40% grape seed oil; 10-40% safflower oil; 10-25% zinc oxide, titanium dioxide or a mixture thereof; 1-4% candelilla wax; and 1-4% rice bran wax, and further comprises 2-40% emulsifier; 0.2-0.4% anti-oxidant source; 0.05-0.2% coloring agent; 0.05-0.2% insect repelling agent; and 0.04-0.1% antiseptic agent.
 9. The method according to claim 7 wherein the sun block product consists of 34.9% grape seed oil; 32.105% safflower oil; 24.5% zinc oxide; 4% beeswax; 2% candelilla wax; 2% rice bran wax; 0.2% green tea powder as the anti-oxidant source; 0.1% Red2 pigment as the coloring agent; 0.15% lavender extract oil as the insect repelling agent; and 0.045% rosemary extract oil as the antiseptic agent. 